Flask sqlalchemy.exc.OperationalError: (OperationalError) no such table when trying to update database with SQLAlchemy

Question

I\'m new to Flask, and having some issues setting up a very basic Flask app. Right now, I\'m trying to get the user to submit a form on the homepage and then save that form to

Answer 1

If you are using flask-migrate library, you should run commands below to create and apply migrations. Database and tables will be created.

flask db migrate
flask db upgrade

Before running this commands you should create models. Models objects represent tables on a database. In your case, it may look like this

class Contact(db.Model):
    id = db.Column(db.Integer, primary_key=True)
    username = db.Column(db.String(80), unique=True, nullable=False)
    email = db.Column(db.String(120), unique=True, nullable=False)